检索结果-南通市图书馆

Science China chemistry 2010年第10期53卷 2164-2169页

作者： su zhi, fan {2. & sun weiyin state key Laboratory of Coordination chemistry Nanjing National Laboratory of Microstructures Coordination chemistry Institute, School of chemistry and Chemical Engineering, Nanjing University, Nanjing 2.0093, China state key Laboratory of Coordination {2. Nanjing National Laboratory of Microstructures Coordination chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing China

Three novel coordination polymers, [Ni2.tib)2.btec)]·2.2. (1), [Co2.tib)2.btec)]·2.2. (2. and [Zn4(tib)2.btec)Cl4]·2.2. (3), have been synthesized by using mixed ligands of 1,3,5-tris(1-imidazolyl)benzene (tib) and 1,2.4,5-benzenetetracarboxylic acid (H4btec) under hydrothermal conditions. Complexes 1 and 2.have the same structure and are rare three-dimensional (3D) self-penetrating (3,4,5)-connected nets, while complex 3 is an unprecedented (3,4)-connected 3D net. The different structures of 1 (2. and 3 are ascribed to the distinct coordination geometry of the metal centers. The thermal stability and photoluminescence property of the complexes were investigated.

关键词： coordination polymer self-penetration crystal structure thermal stability photoluminescence property

在线全文

学校读者我要写书评

暂无评论

对位芳纶中间位结构单元含量的定量分析

应用化学 2024年第8期41卷 1126-1130页

作者：孙浩峻衣小虎程建华苏朝晖中国科学院长春应用化学研究所高分子物理与化学国家重点实验室长春130022 中国科学技术大学合肥230026

在聚对苯二甲酰对苯二胺(PPTA)中引入间位结构可以调控其结晶和加工性能,因此确定其中的间位组分含量具有重要的实际意义。本文将PPTA和间位芳纶(PMIA)共混,采集其红外光谱,发现位于689 cm^(-1)处的间位取代苯环的C—H面内振动谱带强度... 详细信息

在聚对苯二甲酰对苯二胺(PPTA)中引入间位结构可以调控其结晶和加工性能,因此确定其中的间位组分含量具有重要的实际意义。本文将PPTA和间位芳纶(PMIA)共混,采集其红外光谱,发现位于689 cm^(-1)处的间位取代苯环的C—H面内振动谱带强度与PMIA的含量呈现良好的线性正比关系,可以检测出共混样品中含有的质量分数2.0%的PMIA。以拉曼光谱分析共混物,利用位于1002.cm^(-1)的苯环呼吸振动谱带作为PMIA的特征峰,建立了峰强度与PMIA含量的标准曲线,具有良好的线性关系,能够检测出样品中低至质量分数0.2.%的PMIA。2.方法对比,拉曼光谱法具有更高的准确度和灵敏度,优于红外光谱法。

关键词：芳纶定量分析拉曼光谱红外光谱

Analysis and discrimination of ten different sponges by multi-step infrared spectroscopy

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第2期26卷 215-220页

作者： jian-Hong Gan Chang-Hua Xu Hong-Zhe Zhu fang Mao fan Yang Qun Zhou su-Qin sun College of Food Science & Technology Shanghai Ocean University Department of Pharmacy Changzheng HospitalSecond Military Medical University Department of Pharmacy Taian Maternal and Child Health Hospital key Laboratory for Marine Drugs Department of PharmacyState Key Laboratory of Oncogenes and Related GenesRen Ji HospitalSchool of MedicineShanghai Jiao Tong University Department of chemistry Tsinghua University

In this study,a convenient method using multi-step infrared spectroscopy,including Fourier transform infrared spectroscopy（FT-IR）,second derivative infrared spectroscopy（SD-IR） and two-dimensional correlation infrared spectroscopy（2.COS-IR）,was employed to analyze and discriminate ten marine sponges from two classes collected from the Xisha Islands in the South China *** sponge had an exclusive macroscopic *** the IR spectra,it was noted that the main ingredient of calcareous sponges was calcium carbonate,but that of demosponges was *** sponges from the same genus or having highly similar chemical profile（IR spectral profile）,SD-IR and 2.COS-IR were applied to successfully reveal the tiny *** was demonstrated that the multi-step infrared spectroscopy was a feasible and objective approach for marine sponge identification.

关键词： Sponge Discrimination Infrared spectroscopy Second derivative infrared spectroscopy Two-dimensional correlation infrared spectroscopy

1,3,5-三咪唑基苯-醋酸锌配合物的合成、结构和离子交换性质研究

在线全文

学校读者我要写书评

暂无评论

化学学报 2003年第6期61卷 946-949页

作者：樊健孙为银唐雯霞南京大学配位化学国家重点实验室配位化学研究所南京210093

报道了一个由新型三角架配体 1,3 ,5 三咪唑基苯 (L)与Zn(CH3 COO) 2.·2.2.O组装得到的配合物 :[Zn(L) 2.(H2.O) 2.] (CH3 COO) 2.·2.2.O (1) ,用X射线单晶衍射法测定了配合物的晶体结构 ,该晶体属单斜晶系 ,空间群P2.1/n ,晶胞参数... 详细信息

报道了一个由新型三角架配体 1,3 ,5 三咪唑基苯 (L)与Zn(CH3 COO) 2.·2.2.O组装得到的配合物 :[Zn(L) 2.(H2.O) 2.] (CH3 COO) 2.·2.2.O (1) ,用X射线单晶衍射法测定了配合物的晶体结构 ,该晶体属单斜晶系 ,空间群P2.1/n ,晶胞参数a =0 83 3 9(1)nm ,b =1 2.2.0 9(2.)nm ,c =1 75 65 (3 )nm ,β =94 880 (3 )° ,Z =2.,V =1 7819(5 )nm3 ,Dc=1 3 83g/cm3 ,μ =1 5 0 5mm-1,F(0 0 0 ) =15 60 ,R1=0 0 42.9,wR2.=0 0 713 .配合物 1具有二维层状结构 ,醋酸根阴离子位于层与层之间的孔道中。

关键词： 1,3,5-三咪唑基苯-醋酸锌配合物合成离子交换性质晶体结构单斜晶系 X射线单晶衍射法

Pestaloamides A and B,two spiro-heterocyclic alkaloid epimers from the plant endophytic fungus Pestalotiopsis ***30

在线全文

学校读者我要写书评

暂无评论

Science China chemistry 2020年第9期63卷 1208-1213页

作者： Xiao-Zheng su Yi-Ying Zhu jian-Wei Tang Kun Hu Xiao-Nian Li Han-Dong {2. Yan Li Pema-Tenzin Puno state key Laboratory of Phyto{2. and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesYunnan Key Laboratory of Natural Medicinal ChemistryKunming 650201China University of Chinese Academy of Sciences Beijing 100049China

Pestaloamides A and B(1 and 2.,two novel alkaloids featuring an unprecedented spiro[imidazothiazoledione-alkylidenecyclopentenone]scaffold,were obtained from the cultures of an endophytic fungus Pestalotiopsis ***30 which inhabited the stems of Isodon *** planar structures and absolute configurations were fully determined by extensive spectroscopic analysis and X-ray *** addition,both compounds 1 and 2.showed the latent tumor immunotherapy activity through markedly promoting the cell surface engagement of NKG2.D ligands involving MICA/B and ULBP1 in HCT116 cells.

关键词： alkaloids endophytic fungus structure elucidation tumor immunotherapy

Fe-Cu体系催化剂中铁比的测定及其对催化剂性能的影响

在线全文

学校读者我要写书评

暂无评论

石油化工 2002年第8期31卷 612-615页

作者：苏运来叶长明孙建伟王向宇郭益群郑州大学工业催化研究所山西煤炭化学研究所煤转化国家重点实验室山西太原030001

用一种比较简便、快捷的化学分析法对组分较为复杂的Fe-Cu体系低碳醇合成催化剂中的铁比进行了分析 ,即用磷酸保护Fe(Ⅲ )离子 ,用碳酸钠保护Fe(Ⅱ )离子。结果表明 ,该法可有效地排除其它组分的干扰 ,分析结果重复性好 ,相对标准偏差RS... 详细信息

用一种比较简便、快捷的化学分析法对组分较为复杂的Fe-Cu体系低碳醇合成催化剂中的铁比进行了分析 ,即用磷酸保护Fe(Ⅲ )离子 ,用碳酸钠保护Fe(Ⅱ )离子。结果表明 ,该法可有效地排除其它组分的干扰 ,分析结果重复性好 ,相对标准偏差RSD不高于 0 0 5 0 %。此外 ,将Fe -Cu体系催化剂的铁比与其催化性能关联后发现 ,铁比控制在 1 0 0～ 2. 0 0内 ,催化剂显示出较好的生成醇活性和较高的C+2.醇选择性。

关键词： Fe-Cu体系催化剂铁比测定性能影响铁铜氨合成催化剂合成气低碳醇

N-H Insertion Reactions Catalyzed by a Dirhodium Metal-Organic Cage： A Facile and Recyclable Approach for C-N Bond Formation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 2017年第6期35卷 964-968页

作者： jian Kang Lianfen Chen Hao Cui Li Zhang Cheng-Yong su MOE Laboratory of Bioinorganic and Synthetic chemistry Lehn Institute of Functional Materials School of Chemistry Sun Yat-sen University Guangzhou Guangdong 510275 China state key Laboratory of Organometallic {2. Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

A heterogeneous metal-organic cage based on Rh-Rh bonds [Rh4（pbeddb）4（H2.）2.DMAC）2. （MOC-18; pbeddb2. = 3,3＇-（1,3-phenylenebis（ethyne-2.1-diyl））dibenzoate） was applied to the N-- H insertion reactions with diazo compounds. This method offered an environmentally friendly and highly efficient approach for C--N bond formation.

关键词： porous frameworks metal-organic cage heterogeneous catalysis C--N bond formation N--H inser-tion

Arthrinins E-G, Three Botryane Sesquiterpenoids from the Plant Endophytic Fungus Arthrinium sp. HS66

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natural Products and Bioprospecting 2020年第4期10卷 201-207页

作者： Xiao-Zheng su jian-Wei Tang Kun Hu Xiao-Nian Li Han-Dong {2. Pema-Tenzin Puno state key Laboratory of Phyto{2. and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China Yunnan key Laboratory of Natural Medicinal chemistry Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Arthrinins E-G(1-3),three new sesquiterpenoids possessing non-isoprenoid botryane skeleton,were isolated from the fermentation of an endophytic fungus named Arthrinium ***66 which colonized in the stems of Isodon *** structures were determined by extensive spectroscopic ***,the structure of 1 was unambiguously confirmed by X-ray diffraction,while those of 2.and 3 were verified through quantum chemical calculation of NMR data and ECD spectra.

关键词： Isodon xerophilus Endophytic fungus Arthrinium Botryane sesquiterpenoid Quantum chemical calculation

The Cytotoxic Activity of Xanthone Derivatives on Cancer Cells in Vitro:Specific Effect on Human Liver Cancer Cell

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Cytotoxic Activity of Xanthone Derivatives on Cancer Cel...

SARS-CoV-2.impairs the disassembly of stress granules and promotes ALS-associated amyloid aggregation

2.09医学前沿论坛暨第十一届全国肿瘤药理与化疗学术会议

作者： Quan-Guan su~a,Yan Liu~b,Yue-Li sun~a,Bo Wang~(*b),Li-{2. Xian~(*a) a.state key Laboratory of Oncology in Southern China,Cancer Center,sun Yat-sen University, Guangzhou 510060,P.R.China b.School of chemistry & Chemical Engineering,sun Yat-sen University,Guangzhou 5102.5,P.R.China.

Aimed at exploring the potential antitumor activities of xanthone derivatives, twenty-six synthetic hydroxylxanthones and benzoxanthones as well as their structurally perturbed analogs were examined for their cytotoxic activities against eight kinds of human cancer cell lines, HepG2.Lovo,KB,CNE2.HeLa,Capan2.K562.and *** of them exhibited higher cytotoxicity on HepG2.than the other seven cancer cell *** furthermore,six xanthone derivatives with the highest cytotoxicity against HepG2.showed excellent tumor specificity comparing with their effects on the normal liver cell line(L02..Several valuable structure-activity relationships were elicited from the cytotoxic activity *** present results indicated that these xanthone derivatives may be exploitable as lead compounds to develop into a kind of high selectivity and low toxicity antitumor agents specific to liver cancer.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Protein & Cell 2022年第8期13卷 602-614页

作者： Yichen Li Shuaiyao Lu Jinge Gu Wencheng Xia Shengnan Zhang Shenqing Zhang Yan Wang Chong Zhang Yunpeng sun jian Lei Cong Liu Zhaoming {2. Juntao Yang Xiaozhong Peng Dan Li Bio-X Institutes Key Laboratory for the Genetics of Developmental and Neuropsychiatric DisordersMinistry of EducationShanghai Jiao Tong UniversityShanghai 200030China School of Life Sciences and Biotechnology Shanghai Jiao Tong UniversityShanghai 200030China National Kunming High-level Biosafety Primate Research Center Institute of Medical BiologyChinese Academy of Medical Sciences and Peking Union Medical CollegeKunming 650031China state key Laboratory of Medical Molecular Biology Chinese Academy of Medical SciencesSchool of Basic MedicinePeking Union Medical CollegeBeijing 100005China state key Laboratory of Medical Molecular Biology Department of Biochemistry and Molecular BiologyInstitute of Basic Medical SciencesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China Interdisciplinary Research Center on Biology and chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China state key Laboratory of Biotherapy Department of Geriatrics and National Clinical Research Center for GeriatricsWest China HospitalSichuan UniversitChengdu 610041China Bio-X-Renji Hospital Research Center Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200240China Zhangjiang Institute for Advanced Study Shanghai Jiao Tong UniversityShanghai 200240China

The nucleocapsid(N)protein of SARS-CoV-2.has been reported to have a high ability of liquid-liquid phase separation,which enables its incorporation into stress granules(SGs)of host ***,whether SG invasion by N protein occurs in the scenario of SARS-CoV-2.infection is unknow,neither do we know its ***,we used SARS-CoV-2.to infect mam-malian cells and observed the incorporation of N protein into SGs,which resulted in markedly impaired self-dis-assembly but stimulated cell cellular clearance of *** experiments further showed that N protein binds to the SG-related amyloid proteins via non-specific tran-sient interactions,which not only expedites the phase transition of these proteins to aberrant amyloid aggre-gation in vitro,but also promotes the aggregation of FUS with ALS-associated P52.L mutation in *** addition,we found that ACE2.is not necessary for the infection of SARS-CoV-2.to mammalian *** work indicates that SARS-CoV-2.infection can impair the dis-assembly of host SGs and promote the aggregation of SG-related amyloid proteins,which may lead to an increased risk of neurodegeneration.

关键词： SARS-CoV-2 nucleocapsid protein stress granule